ValueError: Failed to submit verification request: Invalid API Key

[Kvicii]

I want to verify FundMe contract, and

1. I get the API-KEY on etherscan.io
2. config .env ETHERSCAN_TOKEN
3. deploy function add publish_source=True

but now deploy in rinkeby, there have some error, like this:
ValueError: Failed to submit verification request: Invalid API Key

I trying some other ways, but don't work, can you answer me

[cromewar]

Hello @Kvicii
This could be for several reasons.

1. You might have a typo on the key.
2. For key is not activated yet.
3. your SO is not recognizing the kye yet (a terminal restart should work).

[Kvicii]

@cromewar hi, what should I do? I think the second one is reason

[cromewar]

really weird, have your code on github? if so please share it so we can review it.

[Kvicii]

No, I intend find bug, If I don't resolve, I will deploy this tomorrow

[Kvicii]

ETH gov issue, thank you, I solved.

[Python-David]

I had this problem for days and finally here's what worked for me:

I changed my global compiler version to the version of solidity I declared for my contract: 0.6.6 (from top left...code > preferences > solidity > settings > search solidity > click on solidity configurations > compile using remote version OR just right click on the "pragma solidity..." and select "Change global compiler version")

For some reason, this worked. I'm guessing it has something to do with this from the brownie documentation - WARNING: Make sure all your source files use the same compiler version, otherwise the verification will fail.

[Kvicii]

@Python-David I just email to ETH.io, and they find problem, then I re-create it, it's work